TypiCMS Core has Stored Cross-Site Scripting (XSS) via SVG File Upload

Summary

TypiCMS is a multilingual content management system based on the Laravel framework. A Stored Cross-Site Scripting (XSS) vulnerability exists in the file upload module of TypiCMS prior to version 16.1.7. The application allows users with file upload permissions to upload SVG files. While there is a MIME type validation, the content of the SVG file is not sanitized. An attacker can upload a specially crafted SVG file containing malicious JavaScript code. When another user (such as an administrator) views or accesses this file through the application, the script executes in their browser, leading to a compromise of that user's session. The issue is exacerbated by a bug in the SVG parsing logic, which can cause a 500 error if the uploaded SVG does not contain a `viewBox` attribute. However, this does not mitigate the XSS vulnerability, as an attacker can easily include a valid `viewBox` attribute in their malicious payload. Version 16.1.7 of TypiCMS Core fixes the issue.

Timeline

1. Feb 25, 2026, 2:36 AM UTCCVE published
2. Feb 26, 2026, 8:59 PM UTCCISA SSVC assessment

   Exploitation: poc · Automatable: no · Technical impact: partial

3. Feb 26, 2026, 8:59 PM UTCRecord last updated

Affected versions

• TypiCMS Core

  fixed in 16.1.7

• typicms/corePackagist

  From 16.0.0 · fixed in 16.1.7

• typicms/corePackagist

  From 15.0.0 · fixed in 15.0.29

• typicms/corePackagist

  From 14.0.0 · fixed in 14.0.27

• typicms/corePackagist

  From 13.0.0 · fixed in 13.0.9

• typicms/corePackagist

  fixed in 12.0.5

References 3